Dashboard Menu fails to load on Opera Mini

[kraftbj]

When viewing any pages in /wp-admin/ while using Opera Mini (tested on Android 4.4 on a Nexus 4), the navigation menu fails to load.

Screenshot: ​https://cloudup.com/cTXkYwljIMx

[iammattthomas]

Opera Mini has no support for webfonts, so it can't load Dashicons in their current state. Internet Explorer on Windows Phone 7 is the other major browser with this problem. Supporting these two browsers would require adding javascript that could detect the lack of font-face support (Modernizr does this) and add a body class like .no-font-face (or whatever), then use the .no-font-face class to create fallback styles where we replace the CSS 'content' with a background-image icon.

[samuelsidler]

We should figure out what to do here before freeze. Perhaps broken is okay for Opera Mini and IE on WP7, but we should make sure we're okay with that.

[markjaquith]

I am completely fine with this.

Opera Mini is a simple proxied web browser service with a focus on reducing mobile bandwidth. It is not intended to run modern web applications.

[matt]

I'm okay with that. As a non-blocker we could improve what people on those browsers see, like a BrowseHappy message.

[SergeyBiryukov]

Related: #26369

[iammattthomas]

From talking to the MP6 team about our available options, it sounds like it would take some time to create a tool to reliably export Dashicons to PNGs. We'd want something at least semi-automated so we're not exporting new images by hand every time an icon is added or changed. I think it would be fair to consider this a future enhancement.

[nacin]

Same issue as #26369, no support for web fonts. Closing as a duplicate.